IOS无法正确解码json格式的表情符号unicode,表情符号图标显示为正方形 [英] IOS cannot decode emoji unicode in json format correctly, and Emoji icons are displayed as squares
问题描述
我正在开发一款iPhone应用程序,允许人们使用表情符号图标发送消息。我使用charset utf8mb4和collation utf8mb4_unicode_ci在Mysql中保存了图标,所有表情符号图标都正确保存在我的数据库中。但是,当我将json返回给客户端(php json_encode)时,表情符号被编码为:'\ ud83d\\\�',并且iPhone将其显示为正方形。但是,如果我以XML格式返回,表情符号图标将不会像这样变成unicode:'\ ud83d\\\�',它只是图标。
I am working on an iPhone app which allows people to send messages with Emoji icons. I saved the icon in Mysql with charset utf8mb4 and collation utf8mb4_unicode_ci, and all the emoji icons is saved correctly in my database. However, when I return json back to the client (php json_encode), the Emoji is encoded as something like this: '\ud83d\ude04', and iPhone displays it as a square. However, if I return as XML, the Emoji Icon won't become unicode like this: '\ud83d\ude04', it will just be the icon.
我想知道这是在我的服务器上还是在我的客户端上的问题。如果它是我的客户端,对象c如何正确解码它。
I am wondering if this is an issue on my server, or on my client. If it is my client, how can object c decode it correctly.
有人可以帮忙吗?
谢谢
推荐答案
\\\�\\\�
是 U + D83D U +的JSON Unicode转义序列DE04
,这是 代理对 为Unicode的U + 1F604(微笑的OPEN嘴和微笑的眼睛FACE)。
"\ud83d\ude04"
is the JSON Unicode escape sequence for U+D83D U+DE04
, which is the "surrogate pair" for the Unicode U+1F604 (SMILING FACE WITH OPEN MOUTH AND SMILING EYES).
但是 NSJSONSerialization
正确解码,如以下示例所示:
But NSJSONSerialization
decodes this correctly, as can be seen in the following example:
const char *jsonString = "{ \"emoji\": \"\\ud83d\\ude04\" }";
NSLog(@"JSON: %s", jsonString);
NSData *jsonData = [NSData dataWithBytes:jsonString length:strlen(jsonString)];
NSError *error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];
self.myLabel.text = [jsonDict objectForKey:@"emoji"];
NSLog(@"Emoji: %@", self.myLabel.text);
输出:
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